Larry King Files for Divorce From Wife No. 7

Larry King has filed for divorce from Shawn Southwick, his seventh wife, after 13 years of marriage, TMZ has learned. In court papers submitted Wednesday afternoon in L.A. County Superior Court, King cites "irreconcilable differences" for wanting to end the marriage.

King's spokesperson Howard Rubenstein confirmed the filing to PEOPLE, saying "his major concern is the welfare of his children, and beyond that he's not going to comment about the divorce."

King lists the separation date as April 13 and is asking the court for joint custody of their two kids and also to deny Southwick any spousal support. Minutes after he filed, Southwick's lawyer followed suit, asking for primary physical custody as well as spousal and child support.

Despite the apparent tension in their relationship, the two were seen together as recently as Tuesday night, when a PopEater source spotted King and Southwick having dinner at a popular Beverly Hills steakhouse.

The CNN talk host, 76, and Southwick, 50, tied the knot in 1997 and have two sons together, 11-year-old Chance and Cannon, 9. This will actually be the eighth divorce from seven different women for the CNN host. She has an older son from one of her three previous marriages.

They exchanged vows in a hospital room shortly before he went into surgery for a clogged blood vessel.

Their touching wedding aside, both have faced infidelity rumors throughout their time together. In December of 2009, the National Enquirer alleged that King had an affair with his wife's younger sister, Shannon Engemann. Sources tell TMZ that Southwick believes King has been having an affair with her sister for five years and the cover was blown when she checked his Visa statement and saw King had bought expensive gifts, including a $160,000 car and "tons of gifts from Cartier." Her sister, tells TMZ it's absolutely not true.

In 2008, Southwick faced cheating claims of her own, as the Enquirer reported she had an affair with the baseball coach of her and Larry's son.

The couple caused a stir in 2007 when they engaged in a very public spat inside and out of a Beverly Hills restaurant. The heated incident forced King's longtime rep, Rubenstein, to clarify: "He only has good feelings about her. He's deeply concerned about her well-being. He has enormous affection for her. He denies berating her."

In 2008, Southwick, a former singer and TV host, entered rehab for addiction to painkillers. Her father, Karl Engmann, told PEOPLE that the issue was related to painful migraines. "She finally decided to do something about it," he said. "We're happy she's taking care of herself and everything will be fine."

Guy Ritchie and MadonnaSplit
The rumors finally came true, as Guy Ritchie and Madonna confirm that they're getting a divorce. For eight years of marriage to Madonna, Ritchie reportedly will make out with about $60 million.

Dave Hogan, Getty Images

Hulk and Linda HoganDivorcing | 24 Years, 2 Kids
The 'Hogan Knows Best' matriarch filed for divorce on Nov. 20. The legendary wrestler got the news from a reporter but recently said he still loves his now estranged wife.

Vince Bucci, Getty Images

Holly Madison and Hugh HefnerSplit
Madison, who starred on the Playboy reality show 'The Girls Next Door,' was one of Hefner's three main girlfriends.

Charley Gallay, Getty Images

Bill Murray and Jennifer Butler MurraySplit
Jennifer filed for divorce after nearly 11 years of marriage. In the papers filed, she alleged that Murray abused her and was addicted to alcohol and marijuana.

Frank Micelotta / Getty Images

Peter Cook and Christie BrinkleySplit | 10 years
After a decade of marriage, Brinkley filed for divorce and accused Cook of having an affair with his 18-year-old assistant.

Jim Spellman, WireImage.com

Rafaello Follieri and Anne HathawaySplit | 4+ years
After a handful of run-ins with the law and his recent incarceration, the Italian businessman Follieri is no longer a red carpet companion for the 'Get Smart' starlet.

Will Ragozzino, Getty Images

Eric Cubiche and Jaime PresslySeparated | Three Years
The 'My Name Is Earl' starlet and her fiance are "taking a break" from their relationship, but remain committed to raising their son, Dezi James, together.

Vince Bucci, Getty Images

Kate Hudson and Lance ArmstrongEnded Romance
The couple that came to be known as HudStrong just couldn't seem to work things out after a few months together.

Getty Images (2)

Drew Barrymore and Justin LongSplit | Almost 1 Year
Despite the fact that they star together in the upcoming movie version of 'He's Just Not That Into You,' the actress and the Mac commercial guy are no longer into each other.

I thought for sure they would last. I mean, his 8th divorce and her 4th marriage? I surely thought they would have gotten *one* right by now....@@ Lockupyerwimmen!!! Studmuffin Larry's on the loose! I can hear the sqeaky wheel of his walker now.......

I used to listen to Larry King when he had a syndicated radio show back in the 90's. He had an excellent show, and was quite entertaining. He has not been good on TV in many years. He marries women who are much younger, and they finally get tired of him and his money. You do not get married as many times as he has, and don't have a problem.

why do they call it larry king live? he looks like he died 10 years ago and no one at the network noticed! he can't even have a conversation without looking at his notes and even then he seems lost. time to go larry.

Just read his book. She had a lot of money of her own before they got married. But she found him to be very funny, which I think he has a great sense of humor. The book was really funny and well written.